Function GenericToScalar

cpp/src/arrow/compute/function_internal.h:282–285

// N.B. ordering of overloads is relatively fragile
template <typename T>
static inline Result<decltype(MakeScalar(std::declval<T>()))> GenericToScalar(
    const T& value) {
  return MakeScalar(value);
}

// For Clang/libc++: when iterating through vector<bool>, we can't
// pass it by reference so the overload above doesn't apply